1925. Sanborn Map Company. Imperial, Allegheny County, Pennsylvania, August 1925. 1 map on 2 sheets : color ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. ... Sanborn Map Company.
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1980. United States. Soil Conservation Service. Shows land use.; "September 1980."; Includes vicinity map. 129 x 102 centimeters 1:50,000. The Service (Harrisburg, Pa.).
1982. United States. Soil Conservation Service. Shows land use.; "January 1982." 109 x 68 centimeters Scale 1:50,000. The Service (Harrisburg, Pa.).
1983. United States. Soil Conservation Service. Shows land use.; "January 1983."; Includes location map. 91 x 112 centimeters Scale 1:50,000. The Service (Harrisburg, Pa.).
1983. United States. Soil Conservation Service. Shows land use.; "February 1983."; Includes location map. 122 x 95 centimeters Scale 1:50,000. The Service (Harrisburg, Pa.?).
1983. United States. Soil Conservation Service. Shows land use.; "February 1983."; Includes location map.; "Sheet 2 of 2." 112 x 91 centimeters Scale 1:50,000. The Service (Harrisburg, Pa.).
1982. United States. Soil Conservation Service. "Interpretations derived from soil survey sheets completed 1979 by Soil Conservation Service, USDA, of Valley County, Montana."; "August 1982 BASE ... The Service (Fort Worth, Tex.).
1980. United States. Soil Conservation Service. "Base map compiled in 1980 by Soil Conservation Service ... from USGS 1:24 000 scale topographic maps dated 1953-1963".; "Interpretations derived f... Geological Survey (Washington, D.C.?).
1887. Sanborn Map Company. Indiana, Penn., Jan. 1887 : and West Indiana. 1 map on 7 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1892. Sanborn Map Company. Indiana and West Indiana, Indiana County, Pa., Feb. 1892 . 1 map on 10 sheets : col. ; sheets 65 x 54 cm. + 1 title sheet. Scale approximately 1:6... Sanborn Map Company.